WO2010134570A1 - Procédé de fabrication d'une roue à ailettes montée sur un turbocompresseur - Google Patents

Procédé de fabrication d'une roue à ailettes montée sur un turbocompresseur Download PDF

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Publication number
WO2010134570A1
WO2010134570A1 PCT/JP2010/058528 JP2010058528W WO2010134570A1 WO 2010134570 A1 WO2010134570 A1 WO 2010134570A1 JP 2010058528 W JP2010058528 W JP 2010058528W WO 2010134570 A1 WO2010134570 A1 WO 2010134570A1
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WO
WIPO (PCT)
Prior art keywords
impeller
mold
die
wheel portion
divided
Prior art date
Application number
PCT/JP2010/058528
Other languages
English (en)
Japanese (ja)
Inventor
智裕 井上
高橋　幸雄
松山　良満
Original Assignee
株式会社Ihi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ihi filed Critical 株式会社Ihi
Priority to EP10777802A priority Critical patent/EP2434125A1/fr
Priority to US13/319,275 priority patent/US20120057986A1/en
Priority to KR1020117028638A priority patent/KR20120011062A/ko
Priority to CN2010800215978A priority patent/CN102428258A/zh
Publication of WO2010134570A1 publication Critical patent/WO2010134570A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/025—Fixing blade carrying members on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/003—Articles made for being fractured or separated into parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/009—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine components other than turbine blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • F01D1/06—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially radially
    • F01D1/08—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially radially having inward flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/34—Rotor-blade aggregates of unitary construction, e.g. formed of sheet laminae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/22—Manufacture essentially without removing material by sintering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/01—Purpose of the control system
    • F05D2270/11—Purpose of the control system to prolong engine life
    • F05D2270/114—Purpose of the control system to prolong engine life by limiting mechanical stresses

Definitions

  • the present invention relates to an impeller manufacturing method applied to a supercharger.
  • Superchargers are often used for the purpose of sending more air into an internal combustion engine.
  • the supercharger includes a compressor, and pressurizes and supplies air to the engine when the compressor is driven.
  • a turbocharger of a type called a turbocharger includes a turbine that receives engine exhaust, and energy extracted from the exhaust by the turbine drives a compressor.
  • the crankshaft of the engine is connected to a compressor and drives it.
  • the turbocharger turbine is equipped with an impeller for converting airflow into rotational force.
  • the impeller usually includes a wheel around a rotation axis and a plurality of blades extending in the radial direction from the wheel. Since each blade has an inclination with respect to the axial direction and further has an airfoil shape, the blade can be rotated by receiving an air flow of the exhaust gas, and can extract energy from the exhaust gas.
  • the impeller needs to precisely realize complex shapes. Further, since the turbine rotates at a high speed as high as several hundred thousand rpm, a slight distortion can cause abnormal rotation. Therefore, extremely high accuracy is required for manufacturing, and its tolerance is only several tens of ⁇ m depending on the part.
  • the turbine impeller since the turbine impeller is exposed to high-temperature exhaust, it must withstand high heat of, for example, about 800 ° C. Therefore, for example, it is necessary to apply a heat-resistant alloy, but since this is inherently extremely difficult to process, it is difficult to apply a normal process that relies heavily on machining.
  • integral molding by precision casting is applied to the manufacture of turbine impellers. For example, parts that require a sharp shape such as the peripheral edge of each blade must be realized only by casting. I can't. Even by precision casting, finishing by machining cannot be omitted.
  • the present inventors are examining the application of powder injection molding to the manufacture of turbine impellers in order to precisely manufacture complex shapes without finishing. Although satisfactory results can be seen in precisely realizing a thin and sharp shape such as a blade, a problem has been found that slight deformation tends to occur during the sintering process.
  • the present invention has been made to overcome such problems.
  • a method of manufacturing an impeller comprising a wheel portion extending in the axial direction and a plurality of blades arranged around the wheel portion is formed by molding an outer diameter of the impeller.
  • Assemble a mold that has a cavity that can be divided into a plurality of molds and inject a kneaded material containing a metal or ceramic powder and a binder into the mold to form a green body and sinter Degreasing and sintering the green body to obtain a body, incorporating the sintered body into a die having a cavity adapted to modify the outer shape of the impeller, and correcting the outer shape of the impeller by pressing the die To do.
  • an impeller comprising a wheel portion extending in the axial direction and a plurality of blades arranged around the wheel portion, wherein the impeller has an outer diameter of the impeller.
  • Assembling a mold that has a cavity that is suitable for forming a mold and that can be divided into a plurality of parts injecting a kneaded product containing a metal or ceramic powder and a binder into the mold to form a green body, Degreasing and sintering the green body to obtain a sintered body, incorporating the sintered body into a die having a cavity adapted to modify the outer shape of the impeller, and pressurizing the die to form the outer shape of the impeller It is manufactured by correcting.
  • FIG. 1 is a diagram illustrating a process of injection molding an impeller according to an embodiment of the present invention, and is a cross-sectional view of a mold and a green body.
  • FIG. 2 is a schematic cross-sectional view showing the stage of degreasing the green body.
  • FIG. 3 is a schematic cross-sectional view showing the stage of sintering the degreased green body.
  • FIG. 4 is a cross-sectional view illustrating a correction process according to the embodiment.
  • FIG. 5 is a cross-sectional view of the impeller according to the embodiment.
  • FIGS. 6A and 6B are cross-sectional views for explaining changes in the shape of the impeller by the correction process, where FIG. 6A shows a state before correction, and FIG.
  • the impeller according to an embodiment of the present invention can be used for, for example, a turbocharger for a vehicle, but can be used for other purposes as well.
  • a turbocharger turbine impeller will be described.
  • the turbocharger generally includes a turbine part, a shaft part, and a compressor part.
  • the turbine impeller takes a role of extracting energy from engine exhaust in the turbine section and converting it into rotational energy. Such rotational energy is transmitted to the compressor portion via the shaft of the shaft portion, and air is compressed by the compressor portion and sent to the engine.
  • the left end of the shaft in the axial direction is coupled to the right end seat 7 of the turbine impeller 1 so as to rotate together around the shaft.
  • Such coupling is by welding, but if possible, other means such as brazing or fitting may be used.
  • the turbine impeller 1 is made of a metal or ceramic formed into a single body by powder injection molding described later, and includes a wheel portion 3 extending in the axial direction and a plurality of blades 9 extending in the radial direction from the wheel portion 3.
  • the periphery of the blade 9 is surrounded by a shroud 13 of the turbine housing, but each outer edge 11 of each blade 9 secures an appropriate gap with respect to the inner surface of the shroud 13 so that the rotation is not interfered.
  • the shroud 13 has a throat configured to guide exhaust from the engine to the blade 9, and the throat surrounds the right end side of the blade 9 in the circumferential direction.
  • the throat may be provided with a variable nozzle 17 so as to adjust the opening degree. Exhaust gas is guided between the blades 9 via a throat, and after giving rotational energy to the turbine impeller 1, it is discharged to an exhaust port on the left side of FIG.
  • the plurality of blades 9 are formed integrally with the wheel portion 3 and are arranged at equal intervals around the shaft. If possible, it may not be equally spaced. Each blade 9 has an inclination with respect to the direction of the axis so as to generate torque by receiving an exhaust airflow, and more preferably has an airfoil shape. Thus, the turbine impeller 1 can extract energy from the exhaust and drive the shaft 9. Each outer edge 11 of each blade 9 is in close proximity to the shroud 13 to minimize airflow diversion.
  • the wheel unit 3 has the seat 7 at the right end thereof.
  • the seat 7 may be a recess slightly retracted from the right end of the wheel portion 3, or may be a hole that considerably enters the inside of the wheel portion 3. Alternatively, if possible, a hole penetrating to the left end may be used.
  • a peripheral wall protruding rightward from the edge of the seat 7 is provided. In any case, the seat 7 is configured to mate with the left end of the shaft 9.
  • the turbine impeller 1 is manufactured by powder injection molding. An apparatus used for powder injection molding will be described below with reference to FIG.
  • the injection molding machine includes a fixed frame 21 and a movable frame 27 for supporting the mold 19.
  • the injection molding machine includes an injection machine (not shown), an injection nozzle 43, an actuator for driving the movable frame 27, and the like.
  • the mold 19 is made of an appropriate metal such as SKD11 (JIS G 4404) and can be appropriately divided.
  • the mold 19 is divided into a base 23 and an outer mold 33, and the outer mold 33 is further divided into a plurality in the circumferential direction.
  • the combination of the molding surface 25 of the base 23 and the molding surface 35 of the outer mold 33 defines a cavity 37 that is adapted to mold the outer shape of the turbine impeller 1.
  • the table 23 has a structure suitable for molding the sheet 7. Since volume shrinkage of about 20% occurs by sintering, the mold 19 and the base 23 are designed in consideration of such volume shrinkage.
  • a block 29 is interposed between the mold 19 and the movable frame 27.
  • the block 29 has a conical concave surface 31 and the mold 19 has a corresponding tapered surface.
  • the movable frame 27 pressurizes the mold 19 due to the contact between the concave surface 31 and the tapered surface, the portions of the outer mold 33 are in close contact with each other in the circumferential direction.
  • an actuator is provided to move the outer mold 33 in the radial direction. Such an actuator may be configured to drive the outer mold 33 in synchronization with the movable frame 27.
  • the fixed frame 21 further includes a spool 97 that communicates with the injection nozzle 43, and the base 23 includes a runner 41 and a gate 39 to communicate with the spool 97 and allow the ejected material to pass therethrough.
  • the runner 41 is provided so as to penetrate the table 23.
  • the gate 39 opens at the right end of the cavity 37.
  • the gate 39 and the spool 97 may be provided in the outer mold 33 or other elements in place of the base 23 or in addition to the base 23.
  • the pressing device includes a block for supporting the die 47 and a ram 59 that is movable in the vertical direction with a pressing force.
  • the die 47 is made of an appropriate metal such as SKD11 (JIS G 4404), and can be appropriately divided.
  • the die 47 is divided into a base 51 and an outer die 53, and the outer die 53 is further divided into a plurality in the circumferential direction.
  • the base 51 of the die 47 is placed on the block, and the outer die 53 is placed further above the base 51.
  • the combination of the upper surface of the base 51 and the inner surface 53 of the outer die defines a cavity.
  • the cavity has a shape that matches the final shape of the turbine impeller 1. Alternatively, a margin may be given to the outer shape of the final shape in a portion not related to the correction.
  • the outer die 53 is divided into a plurality of elements in the circumferential direction, and each element is inserted between each blade 9S, and each pair of adjacent elements sandwiches each blade 9S.
  • the part 55 corresponds to the part 11S of the blade 9S (refer to FIG. 6A)
  • the part 57 corresponds to the part 15S of the blade 9S (FIG. 6A). Corresponding to the reference).
  • a block 61 is interposed between the die 53 and the ram 59.
  • the block 61 has a conical concave surface 63
  • the die 53 has a corresponding tapered surface.
  • a punch 65 adapted to the shape of the seat 7 is provided on the base 51.
  • the punch 65 is connected to a rod 69 penetrating the base 51, and the rod 69 moves up and down by being driven by an actuator such as a hydraulic cylinder.
  • the punch 65 presses the portion 67 of the sintered body 1 ⁇ / b> S and realizes the shape of the sheet 7 at the portion 67.
  • the turbine impeller 1 is manufactured by the following steps.
  • the injection M is kneaded.
  • a mixture of metal powder or ceramic powder and a binder is suitable.
  • metal powder or ceramic powder powders of various materials can be used according to required characteristics.
  • Ni-base heat-resistant alloy Inconel 713C, IN100, MAR-M246, etc.
  • ceramic powder such as silicon nitride and sialon
  • a known powder injection molding binder can be used as the binder.
  • a powder injection molding binder for example, a material obtained by adding an additive such as paraffin wax to a thermoplastic resin such as polystyrene or polymethyl methacrylate can be suitably used.
  • Such a binder after solidifying after injection, retains the form of the injection product until the degreasing step described later, decomposes and evaporates in the degreasing step, and leaves no trace on the sintered product.
  • the mixture of the metal powder or ceramic powder and the binder is heated to, for example, 100 to 150 ° C. and kneaded.
  • the kneading temperature can be appropriately selected depending on the composition of the kneaded product. After kneading, the injection M is obtained by cooling appropriately.
  • the elements of the base 23 and the outer mold 33 are placed on the fixed frame 21.
  • a known release agent may be applied to these in advance.
  • the outer mold 33 is moved inward in the radial direction by the actuator, and the components of the outer mold 33 are brought into contact with each other.
  • the block 29 is brought into contact with these and pressurized by the movable frame 27.
  • the movement of the outer mold 33 by the actuator may be synchronized with the movement of the movable frame 27. Accordingly, the outer mold 33 and the base 23 are in close contact with each other, and the mold 19 is assembled.
  • the injection M is heated to, for example, 160 to 200 ° C. to give sufficient fluidity, and is injected into the mold 19 through the injection nozzle 43 with a pressure of about 100 MPa.
  • the heating temperature and the injection pressure can be appropriately selected depending on the composition of the kneaded product.
  • the injection is solidified and the green body 1F is formed.
  • the molded green body 1F is approximately 20% larger in volume ratio than the final shape in consideration of shrinkage due to sintering.
  • the green body 1F includes a portion 7F that becomes the sheet 7 after sintering, which is also about 20% larger in volume ratio than the final shape.
  • the green body 1F is introduced into an appropriate atmosphere control furnace 71. While introducing nitrogen gas into the furnace and maintaining the nitrogen atmosphere, the inside of the furnace is heated to an appropriate high temperature not exceeding 800 ° C. by appropriate heating means such as a carbon heater, and is maintained for 30 minutes or more. The By this degreasing step, the binder contained in the green body 1F is melted, decomposed, and evaporated to be removed.
  • the degreasing step may be replaced with other known methods such as elution with an appropriate solvent instead of the above-described method.
  • the degreased green body 1F is introduced into a furnace 73 capable of controlling the atmosphere.
  • the inside of the furnace 73 is placed under an appropriate reduced pressure, and the inside of the furnace is heated to an appropriate sintering temperature, for example, 1000 to 1500 ° C. by an appropriate heating means such as a carbon heater, for an appropriate time, for example, 1 hour or more. Retained.
  • an appropriate heating means such as a carbon heater
  • the sintering progresses and the green body 1F contracts.
  • a sintered body 1S indicated by a two-dot chain line in FIG. 3 is obtained.
  • the sintered body 1S is about 20% smaller than the green body 1F in volume ratio and is almost the same as the final shape, but includes some distortion due to sintering.
  • the degreasing step and the sintering step are independent, but these may be carried out continuously.
  • the sintered body 1S is assembled in the die 47 as shown in FIG.
  • the punch 65 is a position where it is pulled downward.
  • the sintered body 1 ⁇ / b> S is placed on the base 51 and is adjusted to an appropriate position by utilizing the coincidence between the structure of the lower surface and the structure of the base 51.
  • the outer die 53 is assembled by inserting each element of the outer die 53 between the blades 9S.
  • the block 61 is interposed so that the tapered surface comes into contact with the concave surface 63, and the ram 59 is lowered.
  • a force acts in a direction in which each element of the outer die 53 is in close contact with each other, and the sintered body 1S is thus entirely pressed.
  • the rod 69 is raised, and the sintered body 1S is pressurized by the punch 65 as well.
  • each element of the outer die 53 corrects the distortion of each blade 9 by a force in a direction in close contact with each other, thereby correcting the surface and shape to match the final shape,
  • the blade 9 is pressurized in a direction perpendicular to the surface.
  • each element of the outer die 53 abuts on the portions 11S and 15S of the blades 9 to correct such portions in the radial direction and pressurizes them in the radial direction.
  • the outer die 53 pressurizes the circumferential surface of the wheel portion 55 radially inward, and pressurizes the upper surface of the wheel portion 55 downward.
  • the lower surface of the wheel portion 55 is pressurized upward by the base 51 and the punch 65. That is, the surface of the sintered body 1S is quasi-isotropically pressurized.
  • Such a correction step may be performed cold or may be performed at an appropriate temperature.
  • the punch 65 is lowered and the ram 59 is raised.
  • the modified turbine impeller 1 is taken out.
  • a turbine impeller in which a complicated shape is precisely realized without finishing by machining.
  • high precision can be obtained particularly in thin, sharp parts such as blades. Since it does not depend on machining, even a difficult-to-work material such as a heat-resistant alloy can be manufactured with high productivity.
  • This embodiment can be suitably applied to a turbine impeller of a turbocharger, but can be applied to various machine parts that require accuracy.
  • a turbine impeller in which a complicated shape is precisely realized without finishing by machining.

Abstract

L'invention porte sur une roue à ailettes composée d'une partie de roue s'étendant en direction axiale et d'une pluralité d'ailettes agencées sur la périphérie de la partie de roue. On réalise la roue à ailettes par assemblage d'un moule comportant une cavité appropriée au moulage du profil de la roue à ailettes, et pouvant être divisé en une pluralité d'éléments, injection dans le moule d'un mélange contenant un liant et des poudres composées d'un métal ou de céramique afin de mouler un élément compact vert ; le dégraissage et le frittage de l'élément compact vert afin d'obtenir un élément compact fritté ; l'incorporation de l'élément compact fritté à une matrice comportant une cavité appropriée à la modification du profil de la roue à ailettes ; et la modification du profil de la roue à ailettes par mise sous pression de la matrice.
PCT/JP2010/058528 2009-05-20 2010-05-20 Procédé de fabrication d'une roue à ailettes montée sur un turbocompresseur WO2010134570A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP10777802A EP2434125A1 (fr) 2009-05-20 2010-05-20 Procédé de fabrication d'une roue à ailettes montée sur un turbocompresseur
US13/319,275 US20120057986A1 (en) 2009-05-20 2010-05-20 Production method of impeller applied to supercharger
KR1020117028638A KR20120011062A (ko) 2009-05-20 2010-05-20 과급기에 적용되는 임펠러의 제조 방법
CN2010800215978A CN102428258A (zh) 2009-05-20 2010-05-20 用于增压器的叶轮的制造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009122057A JP2010270645A (ja) 2009-05-20 2009-05-20 インペラの製造方法
JP2009-122057 2009-05-20

Publications (1)

Publication Number Publication Date
WO2010134570A1 true WO2010134570A1 (fr) 2010-11-25

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Application Number Title Priority Date Filing Date
PCT/JP2010/058528 WO2010134570A1 (fr) 2009-05-20 2010-05-20 Procédé de fabrication d'une roue à ailettes montée sur un turbocompresseur

Country Status (6)

Country Link
US (1) US20120057986A1 (fr)
EP (1) EP2434125A1 (fr)
JP (1) JP2010270645A (fr)
KR (1) KR20120011062A (fr)
CN (1) CN102428258A (fr)
WO (1) WO2010134570A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434470A (zh) * 2011-11-18 2012-05-02 武汉船用机械有限责任公司 一种闭式叶轮的无损测绘方法
CN112360808A (zh) * 2020-09-22 2021-02-12 东风汽车集团有限公司 一种用于涡轮增压器的多级叶轮结构以及涡轮增压器
CN112360809A (zh) * 2020-09-22 2021-02-12 东风汽车集团有限公司 一种用于涡轮增压器的多级叶轮结构
CN112360766A (zh) * 2020-09-22 2021-02-12 东风汽车集团有限公司 涡轮增压器的控制方法

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CN112360808A (zh) * 2020-09-22 2021-02-12 东风汽车集团有限公司 一种用于涡轮增压器的多级叶轮结构以及涡轮增压器
CN112360809A (zh) * 2020-09-22 2021-02-12 东风汽车集团有限公司 一种用于涡轮增压器的多级叶轮结构
CN112360766A (zh) * 2020-09-22 2021-02-12 东风汽车集团有限公司 涡轮增压器的控制方法
CN112360766B (zh) * 2020-09-22 2021-09-21 东风汽车集团有限公司 涡轮增压器的控制方法
CN112360808B (zh) * 2020-09-22 2021-09-21 东风汽车集团有限公司 一种用于涡轮增压器的多级叶轮结构以及涡轮增压器
CN112360809B (zh) * 2020-09-22 2021-09-21 东风汽车集团有限公司 一种用于涡轮增压器的多级叶轮结构

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US20120057986A1 (en) 2012-03-08
EP2434125A1 (fr) 2012-03-28

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